| Saturday, October 4th, 1958 | Placed CL George D'Alton on the 15-day disabled list. | Wednesday, October 1st, 1958 | Activated SS Javier Flores from the disabled list. | Monday, September 8th, 1958 | Placed SS Javier Flores on the 15-day disabled list. | Wednesday, September 3rd, 1958 | Activated LF José Escamilla from the disabled list. | Friday, August 8th, 1958 | C Rodney Moore was designated for assignment and placed on waivers (from active). | Signed Edgardo Santos to a minor league contract with a signing bonus of $36,800. | Thursday, August 7th, 1958 | Signed 1st round draft pick Anthony Cooke for a signing bonus of $125,100 and a 2-year major league contract worth a total of $250,200. | Signed Troy Hartsell to a minor league contract with a signing bonus of $10,700. | Thursday, July 10th, 1958 | Signed Chris Murphy to a minor league contract with a signing bonus of $6,100. | Sunday, June 22nd, 1958 | Signed Ken Grady to a minor league contract with a signing bonus of $10,500. | Wednesday, February 26th, 1958 | Activated CF Jorge Castillo from the 60-day disabled list. | RF Mike Hudson was designated for assignment and placed on irrevocable waivers. | Friday, February 7th, 1958 | MR Rudy Johnson was designated for assignment, placed on waivers and taken off the 40-man roster. | Sunday, February 2nd, 1958 | Activated MR Rudy Johnson from the 60-day disabled list. | MR Jesús Correa was designated for assignment and placed on waivers (from active). | |
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